66667340 has 48 divisors (see below), whose sum is σ = 150075072. Its totient is φ = 24811776.

The previous prime is 66667339. The next prime is 66667397. The reversal of 66667340 is 4376666.

It is a junction number, because it is equal to n+sod(n) for n = 66667294 and 66667303.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15062 + ... + 18978.

It is an arithmetic number, because the mean of its divisors is an integer number (3126564).

Almost surely, 2^66667340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66667340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75037536).

66667340 is an abundant number, since it is smaller than the sum of its proper divisors (83407732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66667340 is a wasteful number, since it uses less digits than its factorization.

66667340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986 (or 3984 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 66667340 is about 8165.0070422505. The cubic root of 66667340 is about 405.4814981501.

The spelling of 66667340 in words is "sixty-six million, six hundred sixty-seven thousand, three hundred forty".